搜题请搜索小程序“爱下问搜题”
问题 填空题

家蚕的发育需经过受精卵、______、______、______四个时期，而且幼虫与成虫的______   和______差异很大，这种发育过程称为______．

答案

完全变态发育，昆虫在个体发育中，经过卵、幼虫、蛹和成虫等4个时期的叫完全变态发育．完全变态发育的幼虫与成虫在形态构造和生活习性上明显不同，差异很大．如蝶、蚊、蝇、菜粉蝶、蜜蜂，蚕等．

故答案为：幼虫，蛹，成虫，形态结构，生活习性，完全变态发育

单项选择题

保证保险中，由于产品质量风险难以估算和控制，保险人通常会在保险合同中制定()，要求被保险人共同承担损失。

A.赔偿限额

B.赔偿百分比

C.共保条款

D.免赔额
查看答案
单项选择题

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modem software development. The notions of (36) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (37) which is concluded with a well-defined (38) and can be further broken down into (39) -a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (40) logically by nature.

A．milestone

B．end-mark

C．measure

D．criteria
查看答案